{"id":75833,"date":"2025-11-27T12:07:59","date_gmt":"2025-11-27T10:07:59","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=75833"},"modified":"2025-11-27T12:07:59","modified_gmt":"2025-11-27T10:07:59","slug":"claudia-binetti-02-12-2025-thermal-effects-in-fracture-and-decohesion-phenomena-multiscale-models-based-on-statistical-mechanics","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/a-la-une\/claudia-binetti-02-12-2025-thermal-effects-in-fracture-and-decohesion-phenomena-multiscale-models-based-on-statistical-mechanics.html","title":{"rendered":"Claudia BINETTI &#8211; 02\/12\/2025 &#8211; Thermal effects in fracture and decohesion phenomena: multiscale models based on Statistical Mechanics"},"content":{"rendered":"<div id='layer_slider_1'  class='avia-layerslider main_color avia-shadow  avia-builder-el-0  el_before_av_heading  avia-builder-el-first  container_wrap sidebar_right'  style='height: 261px;'  ><div id=\"layerslider_58_qcwkvs13ogyt\" data-ls-slug=\"homepageslider\" class=\"ls-wp-container fitvidsignore ls-selectable\" style=\"width:1140px;height:260px;margin:0 auto;margin-bottom: 0px;\"><div class=\"ls-slide\" data-ls=\"duration:6000;transition2d:5;\"><img loading=\"lazy\" decoding=\"async\" width=\"2600\" height=\"270\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg\" class=\"ls-bg\" alt=\"\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg 2600w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-300x31.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-768x80.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1030x107.jpg 1030w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1500x156.jpg 1500w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-705x73.jpg 705w\" sizes=\"auto, (max-width: 2600px) 100vw, 2600px\" \/><ls-layer style=\"font-size:14px;text-align:left;font-style:normal;text-decoration:none;text-transform:none;font-weight:700;letter-spacing:0px;border-style:solid;border-color:#000;background-position:0% 0%;background-repeat:no-repeat;width:180px;height:30px;left:0px;top:231px;line-height:32px;color:#ffffff;border-radius:6px 6px 6px 6px;padding-left:50px;background-color:rgba(0, 0, 0, 0.57);\" class=\"ls-l ls-ib-icon ls-text-layer\" data-ls=\"minfontsize:0;minmobilefontsize:0;\"><i class=\"fa fa-quote-right\" style=\"color:#ffffff;margin-right:0.8em;font-size:1em;transform:translateY( -0.125em );\"><\/i>ACTUALITES<\/ls-layer><\/div><\/div><\/div><div id='after_layer_slider_1'  class='main_color av_default_container_wrap container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-75833'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mih9a83v-10fdd4bca5108d6910974d0d9589e8ef\">\n#top .av-special-heading.av-mih9a83v-10fdd4bca5108d6910974d0d9589e8ef{\nmargin:0 0 10px 0;\npadding-bottom:4px;\ncolor:#e58302;\n}\nbody .av-special-heading.av-mih9a83v-10fdd4bca5108d6910974d0d9589e8ef .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-mih9a83v-10fdd4bca5108d6910974d0d9589e8ef .special-heading-inner-border{\nborder-color:#e58302;\n}\n.av-special-heading.av-mih9a83v-10fdd4bca5108d6910974d0d9589e8ef .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-mih9a83v-10fdd4bca5108d6910974d0d9589e8ef av-special-heading-h2 custom-color-heading  avia-builder-el-1  el_after_av_layerslider  el_before_av_hr  avia-builder-el-first  av-linked-heading'><h2 class='av-special-heading-tag'  itemprop=\"headline\"  >THESE : Claudia BINETTI &#8211; 02\/12\/2025 &#8211; Thermal effects in fracture and decohesion phenomena: multiscale models based on Statistical Mechanics<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-18u73nj-dad6a947580930e400fc42ba200e80f1\">\n#top .hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1{\nmargin-top:5px;\nmargin-bottom:5px;\n}\n.hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1 .hr-inner{\nwidth:100%;\n}\n<\/style>\n<div  class='hr av-18u73nj-dad6a947580930e400fc42ba200e80f1 hr-custom  avia-builder-el-2  el_after_av_heading  el_before_av_textblock  hr-left hr-icon-no'><span class='hr-inner inner-border-av-border-thin'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<section  class='av_textblock_section av-jriy64i8-fd5f2e9d63bf552d6910d12f255eb26e'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" >\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-13ewzjw-649e41ac67c26b53aa0b3d91d18e5f5a\">\n.av_font_icon.av-13ewzjw-649e41ac67c26b53aa0b3d91d18e5f5a{\ncolor:#e58302;\nborder-color:#e58302;\n}\n.av_font_icon.av-13ewzjw-649e41ac67c26b53aa0b3d91d18e5f5a .av-icon-char{\nfont-size:60px;\nline-height:60px;\n}\n<\/style>\n<span  class='av_font_icon av-13ewzjw-649e41ac67c26b53aa0b3d91d18e5f5a avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue8c9' data-av_iconfont='entypo-fontello' ><\/span><\/span>\n<h4><strong><span style=\"color: #e58302;\">Claudia BINETTI<\/span><\/strong><\/h4>\n<p><strong>Mardi 02 d\u00e9cembre 2025 \u00e0 14h00<br \/>\n<\/strong>Amphitheatre of the IEMN-Laboratoire central - Villeneuve d'Ascq<\/p>\n<\/div><\/section>\n<section  class='av_textblock_section av-jtefqx33-26fa44c544b10063385818eda37e027b'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><div  class='hr av-kjh3zw-4dff888f744b728a1aca9b3a0971493a hr-default  avia-builder-el-6  avia-builder-el-no-sibling'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<h5><strong><span style=\"color: #800000;\">Jury :<\/span><\/strong><\/h5>\n<ul>\n<li>Rapporteur: Daniel BONAMY, DR CEA, Paris-Saclay<\/li>\n<li>Rapporteur: J\u00e9r\u00f4me WEISS, DR CNRS, ISTerre Grenoble<\/li>\n<li>Examinatrice: Elsa BAYART, CR CNRS, ENS Lyon<\/li>\n<li>Examinateur: Djimedo KONDO, Prof. UPMC Paris<\/li>\n<li>Examinatrice: V\u00e9ronique LAZARUS, Prof. ENSTA Paris<\/li>\n<li>Codirecteur: Stefano GIORDANO, DR CNRS, IEMN Lille<\/li>\n<li>Codirecteur: Giuseppe PUGLISI, Prof. DICATECh Bari, Italie<\/li>\n<li>Codirecteur invit\u00e9: Nicola M. PUGNO ,Prof. DICAM Trento, Italie<\/li>\n<li>Invit\u00e9: Giuseppe FLORIO, Prof. DICATECh Bari, Italie<\/li>\n<\/ul>\n<h5>Summary:<\/h5>\n<p>Les ph\u00e9nom\u00e8nes de fracture et de d\u00e9coh\u00e9sion dans les mat\u00e9riaux mous r\u00e9sultent de la rupture et dureformage de liaisons \u00e0 l\u2019\u00e9chelle mol\u00e9culaire. Malgr\u00e9 leur diversit\u00e9, plusieurs r\u00e9ponses des syst\u00e8mesartificiels et biologiques suivent des transitions analogues, comme le repliement-d\u00e9pliement desprot\u00e9ines, les transformations martensitiques dans les alliages m\u00e9talliques ou la propagation desfissures dans les structures d\u2019ing\u00e9nierie. Ces transitions sont fondamentales pour la conception demat\u00e9riaux innovants, la nanotechnologie et la mati\u00e8re molle, incluant biomat\u00e9riaux et substances detype caoutchouc. Ces syst\u00e8mes partagent des caract\u00e9ristiques avec la fracture et la d\u00e9coh\u00e9sion qui fontl&rsquo;objet de cette th\u00e8se: (i) la pr\u00e9sence de paysages \u00e9nerg\u00e9tiques \u00e0 bassins multiples, o\u00f9 des\u00a0changements dans les conditions limites peuvent d\u00e9clencher des transitions entre une multiplicit\u00e9d&rsquo;\u00e9tats m\u00e9tastables; (ii) l\u2019\u00e9mergence de r\u00e9ponses macroscopiques \u00e0 partir d\u2019interactions \u00e0 petite\u00e9chelle, comme la micro-fissuration conduisant \u00e0 la d\u00e9faillance des mat\u00e9riaux; et (iii) une sensibilit\u00e9prononc\u00e9e aux effets de temp\u00e9rature et de vitesse, comme la r\u00e9duction de la force n\u00e9cessaire pour lad\u00e9naturation de l\u2019ADN ou pour la d\u00e9lamination de films minces avec l\u2019augmentation de la temp\u00e9ratureet de la vitesse de chargement. En s\u2019appuyant sur ces aspects unificateurs, cette th\u00e8se d\u00e9veloppe et\u00e9tudie des mod\u00e8les multi-\u00e9chelles qui prennent explicitement en compte les effets de la temp\u00e9raturedans une gamme de ph\u00e9nom\u00e8nes de transition, incluant la propagation des fissures, les processusd\u2019adh\u00e9sion et de d\u00e9sadh\u00e9sion, ainsi que la variation de rigidit\u00e9 des ressorts entropiques dans lespolym\u00e8res m\u00e9caniquement entrelac\u00e9s (mechanically interlocked polymers, MIPs). Les applications vontde la m\u00e9canique classique \u00e0 l\u2019\u00e9tude de biomat\u00e9riaux, cytosquelettes artificiels, cellules synth\u00e9tiques etportes logiques nano-m\u00e9caniques. M\u00e9thodologiquement, le cadre multi-\u00e9chelles est ici mis en oeuvre \u00e0travers la formulation concurrente de mod\u00e8les discrets et de mod\u00e8les en limite continue. Les mod\u00e8lesdiscrets int\u00e8grent les effets de la temp\u00e9rature via la m\u00e9canique statistique classique, capturant lesfluctuations \u00e0 l\u2019\u00e9chelle mol\u00e9culaire et nanom\u00e9trique, ce qui permet une d\u00e9rivation rigoureuse des effetsentropiques et thermiques sur le comportement en fracture et d\u00e9coh\u00e9sion. Les mod\u00e8les en limitecontinue d\u00e9crivent les m\u00e9canismes d\u2019\u00e9lasticit\u00e9 et de propagation de fissure \u00e0 l\u2019\u00e9chelle m\u00e9soscopique.Tous les r\u00e9sultats sont obtenus sous forme analytique ferm\u00e9e, fournissant ainsi une caract\u00e9risationrigoureuse des m\u00e9canismes physiques fondamentaux sous-jacents. Du point de vue m\u00e9thodologique, lafracture et la d\u00e9coh\u00e9sion sont analys\u00e9es \u00e0 l\u2019aide d\u2019une approche \u00e9nerg\u00e9tique bas\u00e9e sur le crit\u00e8red\u2019\u00e9nergie de Griffith. Une contribution cl\u00e9 de cette th\u00e8se est l\u2019extension de ce crit\u00e8re classique pourincorporer explicitement l\u2019influence des fluctuations thermiques. L\u2019innovation principale r\u00e9side dans laminimisation de l\u2019\u00e9nergie libre totale du syst\u00e8me, avec des contributions entropiques ajout\u00e9es auxtermes classiques de fracture. Des r\u00e9sultats analytiques sont obtenus pour la d\u00e9pendance des termesd&rsquo;\u00e9nergie de rupture et de d\u00e9coh\u00e9sion, ainsi que pour les contraintes et d\u00e9formations limitescorrespondantes, y compris les contributions r\u00e9sultant de la temp\u00e9rature. Le cadre th\u00e9orique propos\u00e9met en \u00e9vidence des effets significatifs de la temp\u00e9rature, la charge critique diminuant avecl\u2019augmentation de la temp\u00e9rature. Fait remarquable, une temp\u00e9rature critique est identifi\u00e9e \u00e0 laquellele syst\u00e8me subit une transition de phase, conduisant \u00e0 la fracture ou \u00e0 la d\u00e9coh\u00e9sion m\u00eame enl\u2019absence de toute charge m\u00e9canique appliqu\u00e9e. Ces r\u00e9sultats offrent de nouvelles perspectives surl\u2019interaction entre temp\u00e9rature et ph\u00e9nom\u00e8nes de fracture dans un cadre de m\u00e9canique multi-\u00e9chelles,ouvrant des perspectives pour la conception rationnelle de mat\u00e9riaux et syst\u00e8mes avanc\u00e9s dans diversdomaines.<\/p>\n<\/div><\/section>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":71083,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,8,199],"tags":[],"class_list":["post-75833","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-a-la-une","category-actualites","category-these"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/75833","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=75833"}],"version-history":[{"count":3,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/75833\/revisions"}],"predecessor-version":[{"id":75837,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/75833\/revisions\/75837"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media\/71083"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=75833"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=75833"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=75833"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}